title: Ceria and titania incorporated silica based catalyst prepared from rice husk: adsorption and photocatalytic studies of methylene blue.
abstract: Titania and ceria incorporated rice husk silica based catalyst was synthesized via sol-gel method using CTAB and glycerol as surface directing agents at room temperature and labeled as RHS-50Ti10Ce. The catalyst was used to study the adsorption and photodegradation of methylene blue (MB) under UV irradiation. The powder XRD pattern of RHS-50Ti10Ce was much broader (2θ=25-30°) than that of the parent RHS (2θ=22°). The catalyst exhibited type IV isotherm with H3 hysteresis loop, and the TEM images showed partially ordered pore arrangements. The TGA-DTG thermograms confirmed the complete removal of the templates after calcination at 500°C. RHS-50Ti10Ce exhibited excellent adsorption capability with more than 99% removal of MB from a 40 mg L(-1) solution in just 15 min. It also decolorized an 80 mg L(-1) MB solution under UV irradiation in 210 min, which was comparable with the commercialized pure anatase TiO2.
authors.affiliation: School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia. farook@usm.my
authors.forename: Farook
authors.initials: F
authors.lastname: Adam
authors.forename: Lingeswarran
authors.initials: L
authors.lastname: Muniandy
authors.forename: Radhika
authors.initials: R
authors.lastname: Thankappan
mesh_terms: D000327:Adsorption; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D008751:Methylene Blue / Q000302:isolation & purification*; D012275:Oryza / Q000737:chemistry; D010782:Photolysis; D012822:Silicon Dioxide / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C032786:cerium nitrate; D002563:Cerium; D012822:Silicon Dioxide; D014025:Titanium; D008751:Methylene Blue
keywords: Adsorption; Ceria; Methylene blue; Photocatalyst; Rice husk silica; Titania